Coca-Cola is depending on millennials who don't drink Diet Coke to turn around the struggling soda brand. Diet Coke's brand revamp has already put millennials front-and-center. The sleek cans and new flavors, such as Feisty Cherry and Twisted Mango, aim for a trendier drinker than Coca-Cola Classic. For the last few years, Diet Coke has been the weakest link in the company's cola lineup. Industry publication Beverage Digest reported Diet Coke US sales by the dollar dropped 1.9% in 2016. Despite being a zero-calorie drink, Diet Coke has struggled to win over many health-conscious shoppers. Coca-Cola plans to launch "communication and engagement" aimed at both new and loyal Diet Coke drinkers in the coming months.